Dies and dolly.



P. A. GILL.

DIESAND DOLLY.

APPLICATION FILED JULY 25, 1912.

Patented Sept. 24, 1912.

j Z fim/A. Attorne y;

Witnesses FRED A. GILL, OF CULEBRA, CANAL ZONE.

\DIES AND DOLLY. i

Specification of Letters Patent.

Patented Sept. 24, 1912.

7 Application filed July 25, 1912. Serial No. 711,591.

To all whom it may concern:

Be it known that I, FRED A. GILL, a citizen of the United States,residing at Culebra, Canal Zone, Isthmus of Panama, have invented newand useful Dies and Dollies, of which the following is a specification.

One object of the present invention is to provide a novel set ofelements adapted to reface, and to spread to gage, the wings of a drillof the type hereinafter set forth. The invention aims, further, toprovide a set of dies adapted to be employed for refacing the drill, togive the same the desired ap proximate contour, and to provide a dollywhich, being applied to the drill, longitudinally of. the same, willfinish the end face of the drill and spread the wings of the drill togage.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangementof parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In -the drawings,Figure 1 shows in side elevation, a drill of the sortwhich is manipulated by the elements constituting the subject-matter ofthis invention; Fig. 2 is a section on the line 2-2 of Fig. 1; Fig. 3 isa side elevation. of the drill; Fig. 4 is an end elevation of the drill;Fig. 5 is a perspective of one of the dies; Fig. 6 is an end elevationshowing two of the dies together and in operative relation; Fig. 7 is asection on the line 77 of Fig. 6; Fig. 8 is a perspective of the dolly;Fig. 9 is a side elevation of the dolly; Fig. 10 is an end elevation ofthe dolly; and Fig. 1-1 is a transverse section of the dolly on the line1111 of Fig. 10.

The drill. shown in the accompanyin drawings is of novel form, but thedril itself constitutes no part of the present invention. In order,however, that the nature of the invention may be clearl understood, itis necessary to describe the rill in detail.

The drill comprises a shank 1, provided at one end with lateral wings 2,the side faces of which flare, as indicated at 3. The lateral edges ofthe win s 2 flare, also, as indicated at 4. The en edges of the wings 2converge, as shown at 5. Extended longitudinally of the shank 1 areoppositely disposed grooves 6 which, between the wings 2 slope asindicated at 7 to a meeting line 8 which is concaved away from theextremities of the wings 2, as clearly shown in Fig. 1. The drill,considered generally, is of panduriform contour at its cuttin end, aswill be most clearly understood w en Fig. 4 is noted.

In carrying out'the present invention a pair of dies are provided, eachdie being denoted by the numeral 9, and the dies being duplicates. Butone die, therefore, need be described in detail.

Extended transversely of the inner face of the die 9 is a pair ofnotches l0, defining, between them, a core which is denoted generally bythe numeral 11, the core 11 comprising a cylindrical neck 12 and aflaring toe 14. The notches 10 flare laterally, lon itudinally of thedie, as indicated at 15, t e notches flaring also, as indicated at 16,in a direction transverse to the length of the die.

The drill above described is self-sharpening, and on ,account of itspeculiar shape, does not need re-sharpening. The invention hereindisclosed, therefore, is used to 'reface and to put additional stockupon, that part of the drill which has been worn down in use, so thatthe drill is no longer of the correct gage.

In operation, it will be understood that one die is laid upon a support,the other die being placed upon a movable member, such as the plunger ofa steam or air hammer, the defective drill being, in the first instance,placed upon one die, to be shaped by the other die. When the dies thuscooperate, the shaping of the defective drill takes place as follows.The cylindrical neck 12 of the core 11 registers in and shapes one endof the groove 6 in the shank 1. The flaring toe 14 of the core 11 servesto define and to re- Shape the sloping face 7 of the drill. The flare ofthe notches 10, indicated at 15,-serves to shape the side faces 3, andthe flare indicated at 16, serves to give the desired slope or flare tothe edges 4 of the wings 2. The foregoing operation, of course, takesplace while the drill is in a heated condition.

After the drill has been operated u on in the manner above described,the dril is set on end, and is enga ed endwise by a dolly, hereinafterdescribe The dolly comprises a shank 17 and an enlarged head 18.Projecting fromthe head 18, in approximate parallelism to the shankv 17is a pair of oppositely disposed spaced fingers 19. As indicatedat20,-andas seen most clearly in Fig. 110, the adjacent, inner faces ofthe fingers 19 arerounde'd, as shown at 20. As "shown best in Fig; 11,the rounded faces 20'converge as at 21, and meet at a line 22 which iscon-vexed toward the ends ofvthe v fingers 19. Upon both sides of eachof the' fingers 19 are faces 23,- the faces which are adjacent therespective fingers 19 sloping '00- Ward each other, and meeting alongthe line i 22 above mentioned. The peripheries of the.

faces 23 converge at the perlmeter of the .head'18, as indicated at 24.The faces23 not-only slopetoward the line 22 but, as well, slopeawayfingers 19 and toward-the perimeter of the j head 18),. as'indicatejd at25 and as seen most from the {free ends of the i drill, and theline 22in the dolly serving to define the line 8 in the drill. The edgesindicated at'24 in the dolly conform to and serve to shape the edges 5ofthe wings 2 of the drill, and since the faces 23 ofthe dolly areinclined serve to spread the wings 2, sot-hat the drill will be'restoredto correct gage.

- Having thus described the invention, what is claimed is as lndicatedat 25, these faces 1; A pair of like dies, each having in one face, apair of grooves, the grooves flaring in rectangularly disposeddirections to define an intermediate core, comprising a cylindrical neckand a flaring toe.

2. A. dolly comprising opposed fingers, the adjacent faces of w hlCllare transversely curved and slope longitudinally to a meeting line, thedolly having, upon meeting line. r I

lln testimony that I claim the foregoing as my own, I have heretoaflixed my signature in the presence of two witnesses.

Witnesses: I V

WALTER W, HERRINGTON, Rocnn S. ERDMAN.

both sides of each finger, faces which slope to the meeting. 7

line and likewise slope longitudinally of the.

,. v, r 5Q FRED, A. 'eiLn v

